Carrier for auxiliary devices on a cross rolling mill



y 9, 1967 J. HOLUB CARRIER FOR AUXILIARY DEVICES ON A CROSS ROLLING MILLFiled June 30, 1964 INVENTOR United States Patent 3 318 132 CARRIER FORAUXILIARY DEVICES ON A CROSS ROLLING MILL v Jiii Holub, Prague,Czechoslovakia, assignor to Smeralovy zavody, narodni podnik, Brno,Czechoslovakia Filed June 30, 1964, Ser. No. 379,126 Claims priority,application Czechoslovakia, July 6, 1963, 3,920/63 11 Claims. (Cl.72-250) This invention relates to cross-rolling mills, and moreparticularly to a carrier for holding auxiliary devices in properspatial relationship with the rolls of the mill. In its more specificaspects, the invention is concerned with cross rolling mills in whichtwo rolls rotate about parallel axes and are equipped with wedge-shapedcircumferential ridges for shaping stock which passes axiallytherebetween.

Mills of the afore-described device require auxiliary devices such asfeeding devices, abutments, guiding sleeves for the stock being rolled,and the like which have to be positioned in a plane equidistant from theroll faces. It is conventional to support a carrier for such auxiliarydevices on the mill stand by means of brackets which permit adjustmentof the carrier position. Such adjustment becomes necessary whenever thespacing of the roll faces changes either because of roll adjustment fora different stock size, or because of roll wear.

Adjustment of the carrier position on the supporting brackets, oradjustment of the bracket position on the mill stand is time consuming,and is a source of error. Yet, proper centering of the carrier and thedevices sup ported thereon is critical in cross rolling, particularlywhen using rolls with wedge shaped ridges on the working faces of therolls. Even a slight inaccuracy in the carrier position causes theproduction of defective work.

The primary object of the invention is to provide automatic adjustmentof the carrier position whenever the spacing of the rolls is beingchanged.

With this object and others in view, as will hereinafter becomeapparent, the invention in one of its aspects resides in a rolling millhaving two rolls mounted for rotation about spaced axes which extend ina common direction, at least one of the rolls being adjustabletransversely of the common direction, and a motion transmittingmechanism which is interposed between the movable roll and a carrier ofthe type discussed which moves the carrier on fixed guides a firstdistance in the direction of roll adjustment when the movable roll ismoved for adjustment over asecond distance, these distances beingrelated by a fixed numerical ratio.

Other features and many of the attendant advantages of this inventionwill be readily apparent from the following detailed description ofpreferred embodiments, when considered in conjunction with the appendeddrawing in which:

FIG. 1 shows a cross rolling mill of the invention in a fragmentaryside-elevational view, portions of the mill stand being broken away toreveal working elements of the motion transmitting train which moves thecarrier;

FIG. 2 shows the mill of FIG. 1 in front-elevational fragmentarysection; and

FIG. 3 shows a detail of a modified mill in a view corresponding to FIG.1.

Referring now to the drawing in detail, and initially to FIGS. 1 and 2,there is shown as much of a cross rolling mill as is necessary for anunderstanding of this invention, the non-illustrated portions of themill being understood to be conventional.

The mill stand 1 supports an upper roll 2 and a lower roll 6 which arerotated counterclockwise by a non- 3,318,132 Patented. May 9, 1967illustrated drive mechanism when the mill operates, as is indicated byarrows. Ridges 5 on the two rolls extend over approximately one half ofthe working face of each roll and are of uniform radial height. Theytaper circum ferentially' in the direction of roll rotation, and aretherefore wedge-shaped. The upper roll 1 is journaled in the mill standfor rotation about a fixed axis, whereas the lower roll 6 is journaledin two bearing blocks 7 which are slidably guided in the mill stand 1for movement in the plane defined by the parallel axes of the two rolls.The position of the lower roll may be adjusted by threaded spindles 8which are fastened to the bearing blocks 7 and carry nuts 9 for abutmentagainst a face of the mill stand.

A carrier bar 3 is mounted on the mill stand 1 by means of two guidepins 10 which are fixedly fastened on the stand and engage respectivebores in the bar 3. The pins are parallel to the direction of movementof the bearing blocks 7. A longitudinal slot of T-shaped cross sectionin the carrier bar 3 permits auxiliary devices to be mounted on thecarrier, a guide sleeve 4 being shown in the drawing.

A motion transmitting train is interposed between each end of thecarrier bar 3 and one of the bearing blocks 7. Each train includes a rod13 which has eyes at both ends, one of the eyes being hingedly attached.to a fixed lug 12 on the mill stand 1, and the other eye providing afulcrum for a one-armed lever 14.

The free end of the lever 14 is attached to a bearing block 7 by a pivotpin 15. The center of the lever is connected to the carrier bar 3 by alinkage of adjustable length. The linkage consists of two eye-bolts 11a,11b having respective right-handed and left-handed threads, and aconnecting sleeve 11 whose bore has a right-hand internal thread at oneend and a left-hand internal thread at the other end. The eyes of thebolts are hingedly attached to the bar 3 and the lever 14 respectively.

When the mill is assembled, the position of the carrier bar 3 isadjusted by rotation of the sleeves 11 until the auxiliary devicemounted on the bar is precisely centered between the faces of the rolls2, 6. When the roll 6 is subsequently shifted toward or away from theroll 2 on its bearing blocks 7, the carrier bar 3 automatically movesover a distance which is one half of the distance moved by the roll 6. Aseparate adjustment operation for the auxiliary device mounted on thecarrier bar is unnecessary.

The rolling mill partly illustrated in FIG. 3 differs from the apparatusdescribed hereinabove only in details of the motion transmitting trainwhich actuates movement of the carrier bar 3 in response to the movementof the movable roll 6. Two parallel racks 16, 16'

are respectively mounted on the mill stand 1 and on the bearing block 7at each journal of the roll 6. The racks simultaneously mesh with apinion 17 rotatably mounted on a threaded pin which engages theconnecting sleeve 11. In all other respects, the device illustrated inFIG. 3 is as described hereinabove with reference to FIGS. 1 and 2, andit is operated in the same manner.

It should be understood, of course, that the foregoing disclosurerelates only to preferred embodiments of the invention, and that it isintended to cover all changes and modifications of the examples of theinvention herein chosen for the purpose of the disclosure which do notconstitute departures from the spirit and scope of the invention setforth in the appended claims.

I claim:

1. In a rolling mill, in combination:

(a) a mill stand;

(b) two rolls mounted on said stand for rotation about axes extending ina common direction;

(c) adjusting means for moving one of said rolls relative to the otherroll in a direction transverse of said common direction;

(d) a carrier;

(e) guide means on said stand and engaging said carrier for guidingmovement of the same in said trans- I verse direction; and

(f) motion transmitting means interposed between said one roll and saidcarrier for moving said carrier a first distance in said transversedirection when said one roll moves a second distance in said transversedirection, said first distance being smaller than and a predeterminedfraction of said second distance.

2. In a rolling mill as set forth in claim 1, said first distance beingone half of said second distance.

3. In a rolling mill as set forth in claim 1, a circumferential ridge oneach of said rolls, said ridge being wedge shaped and tapering axiallyin the direction of rotation of said roll.

4. In a rolling mill as set forth in claim 1, bearing lrneans movable onsaid stand in said transverse direction, said one roll being journaledin said bearing means, and said motion transmitting means engaging saidbearing means.

5. In a rolling mill, in combination: a mill stand; two rolls mounted onsaid stand for rotation about axes extending in a common direction;adjusting means for moving one of said rolls relative to the other rollin a direction transverse of said common direction; a carrier; guidemeans on said stand and engaging said carrier for guiding movement ofthe same in said transverse direction; motion transmitting meansinterposed between said one roll and said car-rier for moving saidcarrier a first distance in said transverse direction when said one rollmoves a second distance in said transverse direction, said firstdistance being a predetermined fraction of said second distance; andbearing means movable on said stand in said transverse direction, saidone roll being journaled in said bearing means, and said motiontransmitting means engaging said bearing means, said motion transmittingmeans including a lever member having three spaced portions, two of saidportions being respectively hingedly connected to said stand and to saidbearing means, and linking means including two spaced end portionsrespectively articulated to the third portion of said lever member andto said carrier.

6. In a rolling mill as set forth in claim 5, said linking means furtherincluding means for varying the spacing of said end portions thereof.

'7. In a rolling mill as set forth in claim 5, said linking meansfurther including a connecting member formed 4 with a right-handedthread and a left-handed thread, said end portions having respectiveright-handed and lefthanded threads engaging the corresponding threadsof said connecting member.

8. In a rolling mill as set forth in claim 4, said motion transmittingmeans including two racks respectively mounted on said bearing means andon said stand, a pinion simultaneously meshing with said racks, andlinking means including two spaced end portions respectively secured tosaid pinion and to said carrier.

9. In a rolling mill as set forth in claim 8, said linking means furtherincluding means for varying the spacing of said end portions.

10. In a rolling mill, in combination:

(a) a mill stand;

(b) two rolls mounted on said stand for rotation about axes extending ina common direction;

(c) adjusting means for moving one of said rolls relative to the otherroll in a direction transverse of said common direction;

((1) carrier means for holding an auxiliary device in a planeintermediate said axes;

(e) guide means on said stand and engaging said carrier means forguiding movement of the same in said transverse direction; and

(f) motion transmitting means interposed between said one roll and saidcarrier means for moving said carrier means a first distance in saidtransverse direction when said one roll moves a second distance in saidtransverse direction, said first distance being smaller than and apredetermined fraction of said second distance.

11. In a rolling mill as set forth in claim 10, said plane beingequidistant from said rolls in said transverse direction.

References Cited by the Examiner UNITED STATES PATENTS 1,973,458 9/1934Yoder 72--428 2,816,467 12/1957 Thoren 72250 2,962,917 12/1960 Drysdale72-250 3,208,257 9/1965 Holub 72-108 FOREIGN PATENTS 608,410 1/ 1935Germany.

CHARLES W. LANHAM, Primary Examiner.

H. D. HOINKES, Assistant Examiner.

1. IN A ROLLING MILL, IN COMBINATION: (A) A MILL STAND; (B) TWO ROLLSMOUNTED ON SAID STAND FOR ROTATION ABOUT AXES EXTENDING IN A COMMONDIRECTION; (C) ADJUSTING MEANS FOR MOVING ONE OF SAID ROLLS RELATIVE TOTHE OTHER ROLL IN A DIRECTION TRANSVERSE OF SAID COMMON DIRECTION; (D) ACARRIER: (E) GUIDE MEANS ON SAID STAND AND ENGAGING SAID CARRIER FORGUIDING MOVEMENT OF THE SAME IN SAID TRANSVERSE DIRECTION; AND (F)MOTION TRANSMITTING MEANS INTERPOSED BETWEEN SAID ONE ROLL AND SAIDCARRIER FOR MOVING SAID CARRIER A FIRST DISTANCE IN SAID TRANSVERSEDIRECTION WHEN SAID ONE ROLL MOVES A SECOND DISTANCE IN SAID TRANSVERSEDIRECTION, SAID FIRST DISTANCE BEING SMALLER THAN AND A PREDETERMINEDFRACTION OF SAID SECOND DISTANCE.